But where do I configure the launcher to use an image as wallpaper, and which image?
Cheers

Do you mean for newly created users?

It probably very much depends on the rom and the launcher. For CyanogenMod, for example, if you create a new user they get the Trebuchet launcher and the default_wallpaper.jpg in framework-res.apk is the wallpaper used. Which rom and which launcher are you talking about?

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